Food Waste Solution: Colorado’s Heartland Biogas Project Converts Wasted Food to Renewable Energy
Apr 06, 2016 04:20 AM EDT | By Mark Jason Alcala
While some areas face the problem of food shortage and famine, most of the world - especially the developed countries - face the opposite problem of excessive food waste. According to Food and Agriculture Organization (FAO), roughly a third of the world's food produced for human consumption goes to waste.
The problem is even more acute in the United States. According to the National Resources Defense Council (NRDC), Americans are such a wasteful lot with around 40 percent of their food heading to landfills.
It is always commendable when businesses come up with new ways to combat the food waste problem. One such noteworthy approach is the Heartland Biogas Project located in Colorado. How does the Heartland Biogas Project solve the food wastage problem? Instead of letting it rot in a landfill somewhere, Heartland utilizes spoiled food by converting it into electricity.
Heartland Biogas collects wasted food from Colorado's most populous areas and uses it as its raw material. In a process called anaerobic digestion, bacteria convert spoiled food and cow manure into methane gas which is then converted into pipeline grade renewable natural gas (RNG) according to an NPR article by Luke Runyon.
The Sacramento Municipal Utility District purchases the RNG from Heartland in a 20-year agreement. Since Sacramento needs to meet a high state standard of using renewable energy sources for its energy demands, biogas producers help fill that need while addressing the food waste issue at the same time.
Recycling food for electricity is also an environmentally sound move. If left to the landfills, wasted food will eventually break down and release methane into the atmosphere. Methane, as a greenhouse gas, is said to be 21 times more potent the CO2. This means that letting the food rot in landfills could also contribute to global warming.
But the project is now without its critics. NRDC resource specialist Darby Hoover explains that many cities do not use biogas because building biogas generation facilities is expensive. In addition, there are concerns that the food waste recycling capability of the plant might encourage people to be more wasteful. According to Runyon's article, knowing that there is that facility could lessen the guilt of throwing food away.
Environmental Protection Agency (EPA) recycling expert Virginia Till asserts that it more important "to focus on reducing waste in the first place." But even Till had to concede that utilizing food that can't be eaten to produce renewable energy is admirable.
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